TCC76 Datasheet, PDF (139/259 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC76x
Specification Rev. 0.07
32-bit RISC Microprocessor for Digital Media Player
February 23, 2005
UART/IRDA
10 UART/IrDA
10.1 Overview
The TCC76x has 1 simple UART module that can be used in programming the system
software or IrDA interfacing. The block diagram of UART is in the following figure.
LSR
CR
Receiver
FIFO
Receiver
Shift
RZ code
Demod
RXD
DL
Transmit
FIFO
Transmit
Shift
RZ code
Modulator
TXD
IR
IrDACFG2
IrDACFG1
Interrupt
Generator
IREQ
Figure 10.1 UART Block Diagram
This UART is simplified version of UART16550, it provides only a simple interface
(TXD, RXD) between host system and TCC76x system.
In the UART, there are two FIFO blocks each for transmission and reception link.
Transmission FIFO has 4 bytes depth, receiving FIFO has 8 bytes depth.
UART can also be used as IrDA interfacing. There is a signal transformer between IrDA
signal and UART signal.
The basic timing diagram of UART and IrDA data transmission is illustrated in Figure
10.2.
Preliminary
10-1